diff --git a/include/wine/debug.h b/include/wine/debug.h
index aca055fec5b..41f2d3f3960 100644
--- a/include/wine/debug.h
+++ b/include/wine/debug.h
@@ -73,7 +73,7 @@ struct __wine_debug_channel
 #define __WINE_GET_DEBUGGING(dbcl,dbch)  __WINE_GET_DEBUGGING##dbcl(dbch)
 
 #define __WINE_IS_DEBUG_ON(dbcl,dbch) \
-  (__WINE_GET_DEBUGGING##dbcl(dbch) && wine_dbg_log(__WINE_DBCL##dbcl, (dbch), 0, 0) != -1)
+  (__WINE_GET_DEBUGGING##dbcl(dbch) && (__wine_dbg_get_channel_flags(dbch) & (1 << __WINE_DBCL##dbcl)))
 
 #ifdef __GNUC__
 
@@ -148,6 +148,7 @@ struct __wine_debug_functions
                      const char *function, const char *format, va_list args );
 };
 
+extern unsigned char __wine_dbg_get_channel_flags( struct __wine_debug_channel *channel );
 extern void __wine_dbg_set_functions( const struct __wine_debug_functions *new_funcs,
                                       struct __wine_debug_functions *old_funcs, size_t size );
 
@@ -166,12 +167,12 @@ extern int wine_dbg_printf( const char *format, ... ) __WINE_PRINTF_ATTR(1,2);
 extern int wine_dbg_log( enum __wine_debug_class cls, struct __wine_debug_channel *ch, const char *func,
                          const char *format, ... ) __WINE_PRINTF_ATTR(4,5);
 
-extern inline const char *wine_dbgstr_a( const char *s )
+static inline const char *wine_dbgstr_a( const char *s )
 {
     return wine_dbgstr_an( s, -1 );
 }
 
-extern inline const char *wine_dbgstr_w( const WCHAR *s )
+static inline const char *wine_dbgstr_w( const WCHAR *s )
 {
     return wine_dbgstr_wn( s, -1 );
 }
diff --git a/libs/wine/debug.c b/libs/wine/debug.c
index 95c911045ad..6a4cf3ed30f 100644
--- a/libs/wine/debug.c
+++ b/libs/wine/debug.c
@@ -49,7 +49,7 @@ static int cmp_name( const void *p1, const void *p2 )
 }
 
 /* get the flags to use for a given channel, possibly setting them too in case of lazy init */
-static inline unsigned char get_channel_flags( struct __wine_debug_channel *channel )
+unsigned char __wine_dbg_get_channel_flags( struct __wine_debug_channel *channel )
 {
     if (nb_debug_options)
     {
@@ -62,26 +62,6 @@ static inline unsigned char get_channel_flags( struct __wine_debug_channel *chan
     return default_flags;
 }
 
-/* register a new set of channels for a dll */
-void *__wine_dbg_register( struct __wine_debug_channel * const *channels, int nb )
-{
-    int i;
-
-    for (i = 0; i < nb; i++)
-    {
-        channels[i]->flags = ~0;
-        get_channel_flags( channels[i] );
-    }
-    return NULL;
-}
-
-
-/* unregister a set of channels; must pass the pointer obtained from wine_dbg_register */
-void __wine_dbg_unregister( void *channel )
-{
-}
-
-
 /* add a new debug option at the end of the option list */
 static void add_option( const char *name, unsigned char set, unsigned char clear )
 {
@@ -229,8 +209,7 @@ int wine_dbg_log( enum __wine_debug_class cls, struct __wine_debug_channel *chan
     int ret;
     va_list valist;
 
-    if (!(get_channel_flags( channel ) & (1 << cls))) return -1;
-    if (!format) return 0;
+    if (!(__wine_dbg_get_channel_flags( channel ) & (1 << cls))) return -1;
 
     va_start(valist, format);
     ret = funcs.dbg_vlog( cls, channel, func, format, valist );
@@ -400,16 +379,6 @@ const char *wine_dbgstr_wn( const WCHAR *s, int n )
     return funcs.dbgstr_wn(s, n);
 }
 
-const char *wine_dbgstr_a( const char *s )
-{
-    return funcs.dbgstr_an( s, -1 );
-}
-
-const char *wine_dbgstr_w( const WCHAR *s )
-{
-    return funcs.dbgstr_wn( s, -1 );
-}
-
 void __wine_dbg_set_functions( const struct __wine_debug_functions *new_funcs,
                                struct __wine_debug_functions *old_funcs, size_t size )
 {
diff --git a/libs/wine/wine.def b/libs/wine/wine.def
index aecd1a2211a..de6dd3b488d 100644
--- a/libs/wine/wine.def
+++ b/libs/wine/wine.def
@@ -1,9 +1,8 @@
 LIBRARY libwine.dll
 
 EXPORTS
-    __wine_dbg_register
+    __wine_dbg_get_channel_flags
     __wine_dbg_set_functions
-    __wine_dbg_unregister
     __wine_dll_register
     __wine_main_argc
     __wine_main_argv
@@ -13,9 +12,7 @@ EXPORTS
     wine_dbg_log
     wine_dbg_printf
     wine_dbg_sprintf
-    wine_dbgstr_a
     wine_dbgstr_an
-    wine_dbgstr_w
     wine_dbgstr_wn
     wine_dlclose
     wine_dll_get_owner
diff --git a/libs/wine/wine.map b/libs/wine/wine.map
index c6205cf1659..5ab7258edb8 100644
--- a/libs/wine/wine.map
+++ b/libs/wine/wine.map
@@ -1,9 +1,8 @@
 WINE_1.0
 {
   global:
-    __wine_dbg_register;
+    __wine_dbg_get_channel_flags;
     __wine_dbg_set_functions;
-    __wine_dbg_unregister;
     __wine_dll_register;
     __wine_main_argc;
     __wine_main_argv;
@@ -13,9 +12,7 @@ WINE_1.0
     wine_dbg_log;
     wine_dbg_printf;
     wine_dbg_sprintf;
-    wine_dbgstr_a;
     wine_dbgstr_an;
-    wine_dbgstr_w;
     wine_dbgstr_wn;
     wine_dlclose;
     wine_dll_get_owner;